Answer:
What never ends but you always have it
Material for making balls and men that only shows up at certain times of the year.
What dresses for summer and sheds in the winter?
What speeds on a track but isn't in a race and has a whistle to announce its steady pace?
If four people can repair four bicycles in four hours, how many bicycles can eight people repair in eight hours?
Before Google, we actually had to physically look things up in this building full of knowledge.